US5347717A - Chuck assembly for a disposable razor - Google Patents

Chuck assembly for a disposable razor Download PDF

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Publication number
US5347717A
US5347717A US08/147,313 US14731393A US5347717A US 5347717 A US5347717 A US 5347717A US 14731393 A US14731393 A US 14731393A US 5347717 A US5347717 A US 5347717A
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US
United States
Prior art keywords
blade cartridge
pawls
rod
chucking device
chamber
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/147,313
Inventor
Tse-Jen Ts'ai
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Individual
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Priority to US08/147,313 priority Critical patent/US5347717A/en
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Publication of US5347717A publication Critical patent/US5347717A/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
    • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
    • B26B21/225—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit the changeable unit being resiliently mounted on the handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/52—Handles, e.g. tiltable, flexible
    • B26B21/521—Connection details, e.g. connection to razor heads

Definitions

  • the present invention relates to disposable razors, and more particularly relates to a blade cartridge chuck assembly for a disposable razor.
  • a normal disposable razor is generally comprised of a handle having a blade cartridge chuck controlled by two opposite press buttons to hold a blade cartridge. As the chuck is controlled by the two opposite buttons, it is not convenient to operate with a single hand. Further, this double-button chuck control mechanism is complicated, which greatly increases the cost of the razor.
  • a chuck assembly comprises a chucking device having two pawls controlled by a press rod to move toward each other for loading a blade cartridge, a spring worked to return the chucking device to its former position after the loading of the blade cartridge permitting the blade cartridge to be retained to the pawls, and a spring-supported balance rod on which the loaded blade cartridge is balanced.
  • FIG. 1 shows a disposable razor according to one embodiment of the present invention
  • FIG. 2 is an exploded view the chuck assembly of the disposable razor of FIG. 1;
  • FIG. 3 shows the chuck assembly detached from the handle of the disposable razor of FIG. 1;
  • FIG. 4 is a sectional view of the chuck assembly of FIG. 2 before the connection of the blade cartridge;
  • FIG. 5 is a sectional view of the chuck assembly of FIG. 2 after the connection of the blade cartridge
  • FIG. 6 is a sectional view of an alternative form of the chuck assembly according to the present invention before the connection of the blade cartridge;
  • FIG. 7 is another sectional view of the chuck assembly of FIG. 6 showing the blade cartridge loaded.
  • a disposable razor in accordance with the present invention is generally comprised of a handle 1, and a chuck assembly 2 fastened to the connecting tube 11 on one end of the handle 1 to hold a blade cartridge 3.
  • the chuck assembly 2 is comprised of a housing formed of a top shell 21 and a bottom shell 22, and a chucking device 25 fastened to the housing.
  • the top shell 21 comprises a connecting rod 211 extended from the rear end thereof at right angles, a button hole 212 on the rear end, a front opening 213 on the front wall 218 thereof, a substantially U-shaped frame 214 on the inside defining a first chamber 215 within the U-shaped frame 214 and a second chamber 216 outside the U-shaped frame 214, two posts 217;217' disposed within the second chamber 216.
  • a first compression spring 23 is fastened inside the first chamber 215 to support a rod 24.
  • the rod 24 comprises a projecting block 241 pushed by the first compression spring 23 to stop against the front wall 218 of the top shell 21 on the inside, and a rear extension 242 inserted into the first compression spring 23.
  • the chucking device 25 is fastened to the top shell 25 on the inside to hold the blade cartridge 3 outside the top shell 25.
  • the chucking device 25 comprises a U-shaped rod 251 disposed within the second chamber 216 around the U-shaped frame 214, a press rod 252 extended from the U-shaped rod 251 and inserted through the button hole 212 out of the top shell 21, two bevel blocks 253 bilaterally projected from the U-shaped rod 251 and respectively stopped against the front wall 218 of the top shell 21 on the inside, two outward pawls 254;254' horizontally extended from the two opposite ends of the U-shaped rod 251 and disposed outside the top shell 21 and controlled to hold the blade cartridge 3.
  • Each outward pawl 254;254' comprises an arched wall 2543;2543' surrounded by a front flange 2541;2541' and a rear flange 2542;2542'.
  • a second spring 26 stopped between the U-shaped rod 251 of the chucking device 25 and the U-shaped frame 214 of the top shell 21.
  • the bottom shell 22 fits over the top shell 21, comprising a connecting rod 221 matched with the connecting rod 211 of the top shell 21 and then connected to the connecting tube 11 of the handle 1.
  • the bottom shell 22 further comprises two pin holes 222;223', which receives the posts 217;217'.
  • the blade cartridge 3 comprises two hooks 31;31' on the back side thereof, and two arched wall portions 32;32' spaced within the hooks 31;31'.
  • the press rod 252 is pressed with the thumb to move the U-shaped rod 251 forwards. Because the bevel blocks 253;253' are stopped against the front wall 218 of the top shell 21, moving the U-shaped rod 251 forwards causes the U-shaped rod 251 to be squeezed inwards to move the pawls 254;254' toward each other, and therefore the pawls 254;254' can be inserted into the space defined between the hooks 31;31'.
  • the second spring 26 immediately moves the chucking device 25 back to its former position, causing the the pawls 254;254' to extend outwards from each other, and therefore the pawls 254;254' become respectively engaged with the hooks 31;31'.
  • the blade cartridge 3 is balanced on the rod 24; the arched walls 2543;2543 respectively fit over the arched wall portions 32;32' ; the front and rear flanges 2541;2541;2542;2542 limit the movement of the hooks 31 on the pawls 254;254' for permitting the blade cartridge 3 to be oscillated back and forth on the chucking device 25 within a fixed angle.
  • two plates springs 27;27' may be fastened inside the second chamber 216 to retain chucking device 25, as shown in FIGS. 6 and 7, instead of the installation of the compression spring, namely, the second spring 26.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)

Abstract

The chuck assembly includes a chucking device having two pawls controlled by a press rod to move toward each other for loading a blade cartridge, a spring worked to return the pawl to its former position after the loading of the blade cartridge permitting the blade cartridge to be retained to the pawls, and a spring-supported balance rod on which the loaded blade cartridge is balanced.

Description

BACKGROUND OF THE INVENTION
The present invention relates to disposable razors, and more particularly relates to a blade cartridge chuck assembly for a disposable razor.
A normal disposable razor is generally comprised of a handle having a blade cartridge chuck controlled by two opposite press buttons to hold a blade cartridge. As the chuck is controlled by the two opposite buttons, it is not convenient to operate with a single hand. Further, this double-button chuck control mechanism is complicated, which greatly increases the cost of the razor.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a blade cartridge chuck assembly for a disposable razor which can be conveniently operated with a single hand. It is another object of the present invention to provide a blade cartridge chuck assembly for a disposable razor which is inexpensive to manufacture.
To achieve the aforesaid objects, there is provided a chuck assembly comprises a chucking device having two pawls controlled by a press rod to move toward each other for loading a blade cartridge, a spring worked to return the chucking device to its former position after the loading of the blade cartridge permitting the blade cartridge to be retained to the pawls, and a spring-supported balance rod on which the loaded blade cartridge is balanced.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a disposable razor according to one embodiment of the present invention;
FIG. 2 is an exploded view the chuck assembly of the disposable razor of FIG. 1;
FIG. 3 shows the chuck assembly detached from the handle of the disposable razor of FIG. 1;
FIG. 4 is a sectional view of the chuck assembly of FIG. 2 before the connection of the blade cartridge;
FIG. 5 is a sectional view of the chuck assembly of FIG. 2 after the connection of the blade cartridge;
FIG. 6 is a sectional view of an alternative form of the chuck assembly according to the present invention before the connection of the blade cartridge; and
FIG. 7 is another sectional view of the chuck assembly of FIG. 6 showing the blade cartridge loaded.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 1, 2, and 3, a disposable razor in accordance with the present invention is generally comprised of a handle 1, and a chuck assembly 2 fastened to the connecting tube 11 on one end of the handle 1 to hold a blade cartridge 3.
The chuck assembly 2 is comprised of a housing formed of a top shell 21 and a bottom shell 22, and a chucking device 25 fastened to the housing. The top shell 21 comprises a connecting rod 211 extended from the rear end thereof at right angles, a button hole 212 on the rear end, a front opening 213 on the front wall 218 thereof, a substantially U-shaped frame 214 on the inside defining a first chamber 215 within the U-shaped frame 214 and a second chamber 216 outside the U-shaped frame 214, two posts 217;217' disposed within the second chamber 216. A first compression spring 23 is fastened inside the first chamber 215 to support a rod 24. The rod 24 comprises a projecting block 241 pushed by the first compression spring 23 to stop against the front wall 218 of the top shell 21 on the inside, and a rear extension 242 inserted into the first compression spring 23. The chucking device 25 is fastened to the top shell 25 on the inside to hold the blade cartridge 3 outside the top shell 25. The chucking device 25 comprises a U-shaped rod 251 disposed within the second chamber 216 around the U-shaped frame 214, a press rod 252 extended from the U-shaped rod 251 and inserted through the button hole 212 out of the top shell 21, two bevel blocks 253 bilaterally projected from the U-shaped rod 251 and respectively stopped against the front wall 218 of the top shell 21 on the inside, two outward pawls 254;254' horizontally extended from the two opposite ends of the U-shaped rod 251 and disposed outside the top shell 21 and controlled to hold the blade cartridge 3. Each outward pawl 254;254' comprises an arched wall 2543;2543' surrounded by a front flange 2541;2541' and a rear flange 2542;2542'. There is provided a second spring 26 stopped between the U-shaped rod 251 of the chucking device 25 and the U-shaped frame 214 of the top shell 21. The bottom shell 22 fits over the top shell 21, comprising a connecting rod 221 matched with the connecting rod 211 of the top shell 21 and then connected to the connecting tube 11 of the handle 1. The bottom shell 22 further comprises two pin holes 222;223', which receives the posts 217;217'. After the top shell and bottom shells 21;22 are connected together with the posts 217;217' respectively fitted into the pin holes 222;223, they are sealed together through a high-frequency heat sealing process. The blade cartridge 3 comprises two hooks 31;31' on the back side thereof, and two arched wall portions 32;32' spaced within the hooks 31;31'.
Referring to FIGS. 4 and 5 and FIG. 3 again, when the handle 1 is held in the hand, the press rod 252 is pressed with the thumb to move the U-shaped rod 251 forwards. Because the bevel blocks 253;253' are stopped against the front wall 218 of the top shell 21, moving the U-shaped rod 251 forwards causes the U-shaped rod 251 to be squeezed inwards to move the pawls 254;254' toward each other, and therefore the pawls 254;254' can be inserted into the space defined between the hooks 31;31'. As the thumb is released from the press rod 252, the second spring 26 immediately moves the chucking device 25 back to its former position, causing the the pawls 254;254' to extend outwards from each other, and therefore the pawls 254;254' become respectively engaged with the hooks 31;31'. When clamped, the blade cartridge 3 is balanced on the rod 24; the arched walls 2543;2543 respectively fit over the arched wall portions 32;32' ; the front and rear flanges 2541;2541;2542;2542 limit the movement of the hooks 31 on the pawls 254;254' for permitting the blade cartridge 3 to be oscillated back and forth on the chucking device 25 within a fixed angle.
While only one embodiment of the present invention has been shown and described, it will be understood that various modifications and changes could be made without departing from the spirit and scope of the invention. For example: two plates springs 27;27' may be fastened inside the second chamber 216 to retain chucking device 25, as shown in FIGS. 6 and 7, instead of the installation of the compression spring, namely, the second spring 26.

Claims (5)

What is claimed is:
1. A chuck assembly fastened to a handle to hold a blade cartridge, comprising:
a housing formed of a bottom shell and a top shell covered on said bottom shell, said bottom shell comprising two mounting holes; said top shell comprising a button hole on the rear end, a front opening on a front wall thereof, a substantially U-shaped frame on the inside defining a first chamber inside said U-shaped frame and a second chamber outside said U-shaped frame, two posts disposed within said second chamber and respectively fitted into said mounting holes on said bottom shell;
a chucking device retained inside said housing to hold a blade cartridge outside said housing, said chucking device comprising a press rod extended out of said button hole, a U-shaped rod connected to said press rod and disposed inside said second chamber around said U-shaped frame, two symmetrical pawls disposed on two opposite ends of said U-shaped rod and extended out of said housing through said front opening, two bevel blocks projected from said U-shaped rod on two opposite sides and respectively stopped at said front wall of said top shell inside said housing;
first spring means fastened inside said housing to retain said chucking device in position; and
wherein when said press rod is pressed, said bevel blocks are moved forwards and rubbed against said front wall, causing said pawls moved toward each other for loading said blade cartridge on said pawls permitting said blade cartridge to be retained to said pawls after said press rod is released from the pressure and said chucking device is moved back to its former position by said first spring means.
2. The chucking assembly of claim 1 wherein said blade cartridge comprises two hooks spaced on a back wall thereof and respectively engaged with said pawls when loaded.
3. The chuck assembly of claim 1 further comprising second spring means fastened inside said first chamber, and a balance rod supported on said second spring means to balance the blade cartridge being loaded on said pawls.
4. The chuck assembly of claim 1 wherein said first spring means is a compression spring retained between the U-shaped rod of said chucking device and the U-shaped frame of said top shell.
5. The chuck assembly of claim 1 wherein said first spring means comprises two curved plate springs bilaterally disposed inside said second chamber and retained between the U-shaped rod of said chucking device and two opposite lateral walls of said top shell.
US08/147,313 1993-11-05 1993-11-05 Chuck assembly for a disposable razor Expired - Fee Related US5347717A (en)

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USD388541S (en) * 1996-07-01 1997-12-30 Drimmel Nicholas E Curved head beard trimming razor
US5784790A (en) * 1996-04-10 1998-07-28 The Gillette Company Shaving razor and method
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US5953824A (en) * 1997-09-23 1999-09-21 Warner-Lambert Company Razors providing pivoting and swivelling razor head support
US5956851A (en) * 1996-04-10 1999-09-28 The Gillette Company Shaving system including handle and replaceable cartridges
US6041926A (en) * 1996-04-10 2000-03-28 The Gillette Company Dispensing razor blade cartridges used with a handle
USD423143S (en) * 1999-08-19 2000-04-18 Tess Richard Cowell Dual head razor
US6085426A (en) * 1996-04-10 2000-07-11 The Gillette Company Dispensing razor blade cartridges used with a handle
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US20030061718A1 (en) * 2001-10-02 2003-04-03 Dansreau Paul R. Blade cartridge holding, releasing, and capturing mechanism for a replaceable cartridge razor
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USD640004S1 (en) 2009-11-30 2011-06-14 American Safety Razor Shaving razor
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US20170087732A1 (en) * 2015-09-29 2017-03-30 The Gillette Company Adapter For Attaching A Razor Cartridge To A Razor Handle
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Cited By (125)

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Publication number Priority date Publication date Assignee Title
US5533263A (en) * 1991-11-27 1996-07-09 The Gillette Company Razors
US6612040B2 (en) 1991-11-27 2003-09-02 The Gillette Company Razors
US6502318B1 (en) 1991-11-27 2003-01-07 The Gillette Company Razors
US20050193572A1 (en) * 1991-11-27 2005-09-08 The Gillette Company, A Delaware Corporation Razors
US5794354A (en) * 1991-11-27 1998-08-18 The Gillette Company Razors
WO1995009719A3 (en) * 1993-10-01 1996-09-26 Gillette Co Shaving system
GB2297512B (en) * 1993-10-01 1997-08-06 Gillette Co Shaving system
WO1995009719A2 (en) * 1993-10-01 1995-04-13 The Gillette Company Shaving system
US5946805A (en) * 1993-10-01 1999-09-07 The Gillette Company Shaving system
US5933960A (en) * 1995-03-23 1999-08-10 Avidor; Joseph Shaving apparatus and method of shaving
US5918369A (en) * 1996-04-10 1999-07-06 The Gillette Company Shaving system and method
US6029354A (en) * 1996-04-10 2000-02-29 The Gillette Company Shaving system and method
US5890296A (en) * 1996-04-10 1999-04-06 The Gillete Company Razor handle
US5784790A (en) * 1996-04-10 1998-07-28 The Gillette Company Shaving razor and method
US5787586A (en) * 1996-04-10 1998-08-04 The Gillette Company Shaving system and method
US5855071A (en) * 1996-04-10 1999-01-05 The Gillette Company Razor handle
US5822869A (en) * 1996-04-10 1998-10-20 The Gillette Company Razor handle
US5813293A (en) * 1996-04-10 1998-09-29 The Gillette Company Shaving system and method
US5956851A (en) * 1996-04-10 1999-09-28 The Gillette Company Shaving system including handle and replaceable cartridges
US6237232B1 (en) 1996-04-10 2001-05-29 The Gillette Company Dispensing razor blade cartridges used with a handle
US6041926A (en) * 1996-04-10 2000-03-28 The Gillette Company Dispensing razor blade cartridges used with a handle
US6192586B1 (en) 1996-04-10 2001-02-27 The Gillette Company Dispensing razor blade cartridges used with a handle
US6052903A (en) * 1996-04-10 2000-04-25 The Gillette Company Dispensing razor blade cartridges used with a handle
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